I have a 1980 Chevy Monte Carlo with a small block Chevy 400 on a 700 R4 Transmission I would like to know the exact detent cable that I need for the 700R4 transmission to a Holley carburetor I have the Holley carburetor bracket 20 - 95 how long should do detent cable be I cannot get Full Throttle with the cable that I have now ? THANKS